package com.example.demo.Utils;

/**
 * Created by wangyg6 on 2020/8/4 15:17.
 */
public class StringUtil {
	public static boolean isNumeric(String str) {
		for (int i = str.length(); --i >= 0; ) {
			if (!Character.isDigit(str.charAt(i))) {
				return false;
			}
		}
		return true;
	}
}
